LI Guanghua,YANG Pingping,ZHAO Zhiju,GAO Zhensheng,HE Liqiu,TONG Zhangfa" />
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LI Guanghua,YANG Pingping,ZHAO Zhiju,GAO Zhensheng,HE Liqiu,TONG Zhangfa
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李光华,杨苹苹,赵治巨,高振胜,何丽秋,童张法
Abstract:
Poly(tert-butyl acrylate)(PtBA)telomer with tribromomethyl end group was synthesized by radical telomerization of tert-butyl acrylate(tBA)with CBr4 as telogen and 2,2′-azobisisobutyronitrile(AIBN)as initiator. The number-average molecular weight(Mn)of PtBA-Br telomers was determined by GPC and 1H NMR,and PtBA-Br telomers with Mn of 2730—9200 were obtained. The Mn calculated from 1H NMR spectrum matched well with the Mn,GPC results. In order to accurately control the molecular weight of PtBA-Br telomers,the chain transfer constant(Cs)of CBr4 was determined by using the Mayo equation and simulation,and the value was 1.11 at 60℃. When the ratio of telogen and monomer concentration was 0. 02,the Mn of PtBA-Br telomers at 60℃ was between 5940 and 6450 at increased conversion from 25% to 73%. The Mn values were consistent with simulation results and the molecular weight distributions were all under 1.70.
摘要:
以丙烯酸叔丁酯(tBA)为单体,CBr4为调聚剂,利用自由基调聚反应,合成了末端有—CBr3基团的聚丙烯酸叔丁酯(PtBA-Br)调聚物。利用GPC和1H NMR对PtBA-Br的数均分子量(Mn)进行了测定,其值为2730~9200。为了准确地控制调聚物的分子量,利用Mayo方程和模拟的方法得到了
LI Guanghua,YANG Pingping,ZHAO Zhiju,GAO Zhensheng,HE Liqiu,TONG Zhangfa. Synthesis of poly(tert-butyl acrylate)telomer by free-radical telomerization[J]. .
李光华,杨苹苹,赵治巨,高振胜,何丽秋,童张法. 自由基调聚法合成聚丙烯酸叔丁酯调聚物 [J]. CIESC Journal.
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https://hgxb.cip.com.cn/EN/Y2011/V62/I7/2061